ko4j registers implementation of Transfer and WSTransfer based on XHR and WebSocket from a browser. The Java implementations of these interfaces has been moved to ko-ws-tyrus module. JavaScript arrays passed as parameters to Java callback methods need to be wrapped.
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43 package org.netbeans.html.ko4j;
45 import java.io.ByteArrayOutputStream;
46 import java.io.Closeable;
47 import java.io.IOException;
48 import java.io.InputStream;
49 import java.io.InputStreamReader;
50 import java.util.concurrent.Executor;
51 import java.util.logging.Logger;
52 import net.java.html.js.JavaScriptBody;
53 import org.apidesign.html.boot.spi.Fn;
54 import org.apidesign.html.json.spi.FunctionBinding;
55 import org.apidesign.html.json.spi.JSONCall;
56 import org.apidesign.html.json.spi.PropertyBinding;
57 import org.apidesign.html.json.spi.Technology;
58 import org.apidesign.html.json.spi.Transfer;
59 import org.apidesign.html.json.spi.WSTransfer;
61 /** This is an implementation package - just
62 * include its JAR on classpath and use official {@link Context} API
63 * to access the functionality.
66 * @author Jaroslav Tulach <jtulach@netbeans.org>
69 implements Technology.BatchInit<Object>, Transfer, WSTransfer<LoadWS> {
70 static final Logger LOG = Logger.getLogger(FXContext.class.getName());
71 private static Boolean javaScriptEnabled;
72 private final Fn.Presenter browserContext;
74 public FXContext(Fn.Presenter browserContext) {
75 this.browserContext = browserContext;
78 @JavaScriptBody(args = {}, body = "if (window) return true; else return false;")
79 private static boolean isJavaScriptEnabledJs() {
83 static boolean isJavaScriptEnabled() {
84 if (javaScriptEnabled != null) {
85 return javaScriptEnabled;
87 return javaScriptEnabled = isJavaScriptEnabledJs();
90 final boolean areWebSocketsSupported() {
91 return LoadWS.isSupported();
96 public Object wrapModel(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr) {
97 String[] propNames = new String[propArr.length];
98 boolean[] propReadOnly = new boolean[propArr.length];
99 Object[] propValues = new Object[propArr.length];
100 for (int i = 0; i < propNames.length; i++) {
101 propNames[i] = propArr[i].getPropertyName();
102 propReadOnly[i] = propArr[i].isReadOnly();
103 propValues[i] = propArr[i].getValue();
105 String[] funcNames = new String[funcArr.length];
106 for (int i = 0; i < funcNames.length; i++) {
107 funcNames[i] = funcArr[i].getFunctionName();
109 Object ret = Knockout.wrapModel(model,
110 propNames, propReadOnly, propValues, propArr,
117 public Object wrapModel(Object model) {
118 throw new UnsupportedOperationException();
122 public void bind(PropertyBinding b, Object model, Object data) {
123 throw new UnsupportedOperationException();
127 public void valueHasMutated(Object data, String propertyName) {
128 Knockout.valueHasMutated(data, propertyName);
132 public void expose(FunctionBinding fb, Object model, Object d) {
133 throw new UnsupportedOperationException();
137 public void applyBindings(Object data) {
138 Knockout.applyBindings(data);
142 public Object wrapArray(Object[] arr) {
147 public void extract(Object obj, String[] props, Object[] values) {
148 LoadJSON.extractJSON(obj, props, values);
152 public void loadJSON(final JSONCall call) {
153 if (call.isJSONP()) {
154 String me = LoadJSON.createJSONP(call);
155 LoadJSON.loadJSONP(call.composeURL(me), me);
158 if (call.isDoOutput()) {
160 ByteArrayOutputStream bos = new ByteArrayOutputStream();
162 data = new String(bos.toByteArray(), "UTF-8");
163 } catch (IOException ex) {
164 call.notifyError(ex);
167 LoadJSON.loadJSON(call.composeURL(null), call, call.getMethod(), data);
172 public <M> M toModel(Class<M> modelClass, Object data) {
173 return modelClass.cast(Knockout.toModel(data));
177 public Object toJSON(InputStream is) throws IOException {
178 StringBuilder sb = new StringBuilder();
179 InputStreamReader r = new InputStreamReader(is);
187 return LoadJSON.parse(sb.toString());
191 public void runSafe(final Runnable r) {
192 class Wrap implements Runnable {
193 @Override public void run() {
194 Closeable c = Fn.activate(browserContext);
200 } catch (IOException ex) {
207 if (browserContext instanceof Executor) {
208 ((Executor)browserContext).execute(w);
215 public LoadWS open(String url, JSONCall onReply) {
216 return new LoadWS(onReply, url);
220 public void send(LoadWS socket, JSONCall data) {
225 public void close(LoadWS socket) {